Google Play Store‎ - Unity3d apk : Upload failed You uploaded an APK signed with a certificate that is not yet valid.

Google Play Store‎ - Unity3d apk : Upload failed You uploaded an APK signed with a certificate that is not yet valid.

Test environment:
1. Mac OS X 10.9.4,
2. Unity3d
3. Android SDK

[Error]
Upload failed
You uploaded an APK signed with a certificate that is not yet valid. You need to sign your APK with a certificate that is currently valid.

[Solved]
1. change your mac date & time to previous date or previous week.
*for example, if your machine current date is 30/12/2014. change it to 29/12/2014.

2. use unity3d create new .keystore and build apk file then upload apk to google play store.

It's work!.

[How is this happen?]
1. change your mac date & time to next date or next week is enough.
2. use unity3d create new .keystore and build apk file then upload apk to google play store.

Have fun.